Re: C64 power supply replacement

From: Ryan Underwood (
Date: 2004-01-10 13:25:41

On Sat, Jan 10, 2004 at 03:33:13AM +0200, wrote:
> Hey Ryan,
> sorry to hear about your problems with the PSU.
> However, could you tell me more about this "Pinto" power supply?
> How does it blow up your C-64, exactly?

I read on comp.sys.cbm archives that this power supply used a rectifier
to cut the 9V down to 5V, and eventually due to heat/age, the
regulator would short and you would end up with 9V on the 5V output,
which isn't too nice to the C64 logic...

> And, do you have pictures of this PSU, so I can be sure which exactly you mean?

Yeah, see here:

This is after cracking the shell off and trying to chip some of the
epoxy off -- you can see a heat/ground plate exposed on the right side
of the picture.

> I think it's simple to reverse engineer the PSU.

I would think so too, if I had a way of getting rid of this brick of
epoxy without destroying the circuit....

Ryan Underwood, <>

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